<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<script>
function boom()
{
  var xt = document.createElementNS("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", 'textbox');
  document.body.appendChild(xt);
  xt.setAttribute('disabled', "true");
  xt.setAttribute('value', "foo");
}
</script>
</head>
<body onload="boom();">
</body>
</html>
